Yokohama-shi, Japan
Yokohama-shi, Japan

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Patent
JP Steel Plantech Co. | Date: 2014-12-24

A roller leveler (100) for flattening sheet material (S) includes: a leveling roll unit (20) that has a plurality of leveling rolls (6, 8) configured to rotate so as to pass the sheet material while sandwiching and pressing the sheet material (S) interposed therebetween; pushing cylinders (4a, 4b) configured to press the sheet material (S) via the leveling rolls (6, 8) and provided on each of an entrance side and a discharge side of the leveling roll unit (20), on which the sheet material (S) enters and is discharged into and from the leveling roll unit (20), respectively; and a driving mechanism (15) configured to rotate the leveling rolls (6, 8) to pass the sheet material (S), wherein the plurality of leveling rolls (6, 8) are designed so that a diameter (D) thereof satisfies a relation, 0.5


A method of and an apparatus for controlling a molten metal surface in a mold that are effective to various disturbances are provided. The method of controlling a molten metal surface level in a mold according to the present invention is characterized by including: measuring the molten metal surface level in the mold of a continuous-casting machine; changing a reference position of oscillation of the mold based on the difference between a molten metal surface setting value set in advance as a desired value of the molten metal surface and a measured value of the molten metal surface level; and making the reference position of oscillation follow molten metal surface fluctuations.


Patent
JP Steel Plantech Co. | Date: 2015-10-07

Leveler equipment (100) includes a leveler body (10), a first roll cassette (20) for a roller leveler, and a second roll cassette (30) for a tension leveler. The roller leveler is formed when the first roll cassette (20) is attached to the leveler body (10), and the tension leveler is formed when the second roll cassette (30) is attached to the leveler body (10).


Patent
JP Steel Plantech Co. | Date: 2015-03-11

A roller leveler (100) includes: a leveling roll unit (20) having a plurality of leveling rolls (6, 8a, 8b) configured to rotate so as to pass a plate (P) while sandwiching and pressing the plate; a pushing cylinder (4a, 4b) provided at each of an entrance side and a discharge side of the leveling roll unit (20), at which the plate enters and is discharged, respectively, and configured to press the plate (P) via the leveling rolls (6, 8a, 8b); and a driving mechanism (15) configured to rotate the leveling rolls (6, 8a, 8b) to pass the plate (P). At least one (8b) of the plurality of leveling rolls (6, 8a, 8b) has a stepped structure, including a lateral center portion (21) with a large diameter, corresponding to a center portion of the plate with respect to a plate width direction, and lateral end portions (22) with a small diameter, corresponding to edge portions of the plate with respect to the plate width direction.


Patent
JP Steel Plantech Co. | Date: 2013-05-01

A coke dry quenching facility (100) includes a cooling tower (1) including a charge port (11) for charging the red-hot coke on an upper side and configured to cool the red-hot coke charged therein; a furnace top lid (12) configured to open and close the charge port (11); a gas circulation passage (31, 22) configured for gas including cooling gas to be circulated and including a cooling gas flow passage (31) through which the cooling gas flows toward the cooling tower (1) and a high temperature gas flow passage (22) through which high temperature gas generated by heat exchange with the red-hot coke flows; a waste heat recovery boiler (4) disposed in the gas circulation passage (31, 22) and configured to recover heat of the cooling gas having a high temperature due to heat exchange with the red-hot coke; an adjustment mechanism (5, 6) configured to adjust a flow rate of gas circulated through the cooling tower (1) and the gas circulation passage (31, 22); and a control system (7) that controls the flow rate of the gas circulated through the cooling tower (1) and the gas circulation passage (31, 22) to be smaller during a charging operation of the red-hot coke into the cooling tower (1) with the furnace top lid (12) set open, as compared to a normal running operation with the furnace top lid (12) set closed.


Patent
JP Steel Plantech Co. | Date: 2013-05-22

The baffle plate unit (24) includes a pair of baffle plates (22) and a position adjustment mechanism (23) configured to adjust the positions of the pair of baffle plates (22) relative to the width direction edges of a metal strip. The position adjustment mechanism (23) includes a pair of electromagnetic-wave sensor units (32) configured to respectively detect the positions of the pair of width direction edges of the metal strip (1), whose detection values are used by a control section (33) to control the positions of the baffle plates (22). Each of the electromagnetic-wave sensor units (32) includes a detecting section (38) equipped with an antenna configured to emit electromagnetic waves and to receive electromagnetic waves reflected by corresponding one of the width direction edges of the metal strip (1), and a main body section (37). The detecting section (38) is fixedly disposed at a position distant by a predetermined length from corresponding one of the width direction edges of the metal strip (1).


Patent
Jp Steel Plantech Co. | Date: 2015-02-03

A roller leveler is provided having a substantially uniform pitch of leveling rolls arranged in a zigzag manner. The roller leveler has a first roll group with first leveling rolls at a pitch P1, a second roll group with second leveling rolls at the pitch P1, a first retract mechanism for retracting the middle first leveling rolls, and second retract mechanisms for retracting pairs of end second leveling rolls. The second roll group also has third leveling rolls at the pitch P1 with respect to the outermost second leveling rolls.


Patent
JP Steel Plantech Co. | Date: 2016-04-27

A continuous casting machine includes: a mold; a dummy bar curved at a uniform curvature in a longitudinal direction and configured to be inserted into the mold to receive molten steel when casting is started; guide rolls configured to guide, downward along a circular path, the dummy bar and a cast piece that have been drawn out of the mold, the circular path passing through the mold and having the curvature radius; a delivery portion configured to deliver, in a tangential direction of the circular path, the cast piece separated from the dummy bar at a bottom portion of the circular path; and a guide mechanism configured to allow the dummy bar separated from the cast piece to move along the circular path and configured to insert the dummy bar into the mold from above the mold.


Patent
JP Steel Plantech Co. | Date: 2014-11-05

An arc furnace includes: a body (1) to be charged with material (S) to be melted; a roof (4) closing an upper opening of the body (1); an arc electrode (5) inserted into the body (1) from above the roof (4) and energized to form electric arcs to melt the material; and an exhaust port (6), through which exhaust gas in the body (1) is discharged, wherein: the arc electrode (5) is arranged so that the center of arc heating is laterally offset from the center of the body in a horizontal plane with respect to the body (1); the exhaust port (6) is provided in a side wall of the body (1) on a side opposite to the offset direction of the arc electrode (5) at a height below the level of presence of the material (S); and the exhaust gas produced by the arc heating by the arc electrode (5) is discharged from the exhaust port (6) through the material (S) in the body (1).


A material conveying bucket (4) for conveying raw material to be melted in a furnace (3) to a preheater (2) for preheating the raw material before melted in the furnace (3) by heat generated in the furnace (3), with the bucket (4) hung by a crane, includes: a container portion (60) having a raw material-containing container portion (60) having an upper and bottom opening, a top cover (62) for opening/closing the upper opening, and a bottom lid (63) for opening/closing the bottom opening; a handle portion (70) to be hung by the crane; and a link mechanism (80) connected to the top cover (62) and the bottom lid (63), connecting the handle portion (70) relatively movably to the container portion (60), and having a function of opening/closing the top cover (62) and the bottom lid (63) by a first and second relative movement of the handle portion (70) relative to the container portion (60), respectively, the second relative movement being different in direction from the first relative movement.

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